Boiler



Aug. '14, 1928! 1,680.93]

J. H. BAKER BOILER Filed Jan. 18, 1926 lllllllllll E5 i M 3/ INVENTOR. /P i V. V 1 V 7 i Q Joan H BBKER I r, BY

a trap for the combustible gases which procecd u 'iwardly from the heating element which is positioned beneath the header 18. If desired the haulers may be positioned in vertical alignment and the upper headers made larger, and particularly where a large number of sections are used. This heating element may be of any desired or conventional type and forms no part of this invention, and therefore, is not shown.

As shown in Fig. 1, the dome 12, is connected by a pipe 22 to one of the legs 23 of a U-shaped dome, the steam outlet 24 being connected adjacent the other end. The purpose ol such an arrangement is to force the steam generated in the boiler to travel the maximum distance in the domes. so that a dry steam may be utilized for power purposes. As shown in Fig. 3. the parallel extending tubular members 16 and 17 project beyond the cross member 15, to provide a portion upon which may be positioned a sleeve 25, which is welded to a supporting portion 26 of a Z-shaped bracket 27. the other angularly turned end 28 of which engages the cross beam 29 of the chassis of the vehicle with which used. A similar sleeve 25 supported by a similar bracket 27 may be utilized for engaging the opposite ends of the tubular members 16 and 17. It is, of course, apparent that where the boiler is used as a stationary boiler, this method of mounting may be varied to suit specific needs. An intake pipe or water delivery pipe 30 communicates with the interior of the steam dome 12 and is angularly turned to provide the downwardly extending pipe 31, which projects downwardly in the reservoir 13 below the normally low Water line so that when the water is taken into the boiler, it does not mix with the steam in the dome 12. Formed in the reservoir 13 is an opening 32 normally closed by a suitable plug and in which may be secured a suitable pipe for leading oil the oil which may be carried into the reservoir 13 by the water delivered thereto. This oil will, of course, float upon the water and when the opening 32 is opened, while the boiler is under pressure, the oil will be blown out of the opening 32 and through the pipe attached thereto.

As shown in Fig. 3, the leg 28 of the U- shapcd dome is provided with an angularly turned depending reservoir forming portion 33, which is reduced at its lower end, to provide the tubular portion 3% which connects to the cross pipe 15. The depending reservoir portions 13 and 33, in addition to serving as storage tanks for the water used in the boiler, also serves to assist the circulation of the water, particularly when the boiler is used on a vehicle, because of the pressure exerted downwardly by the water contained in the tubes 14: and 8t and by supplying a large volume of Water for filling up such vacancies as are caused by a sudden movement of the vehicle and the travel rearwardly of the water in the tubes 16 and 17, as well as the lateral travel ol the water in the lower headers 18. 'lhese reservoir also serve to protect the headers from burning out; because of the rising ot the water from the headers, when the heat is rapidly applied, the large volume serving to supply additional water through the reduced portions Ill and let, and the tubular members 1.3, 16 and 17. As shown in Fig. 3. a clean-out pipe 35 connects with the pipe 16. it is apparent that one of these clean-out. pipes may be connected to the pipe 17, if desired. in additional steam outlet flt' may be used when necessary and projecting from the end of the dome 12 is a pipe 37 connnunicating with the balancing and indicating systems conventionally used on boilers. Positioned l etween the reservoirs :33 and 13 and the end layer of tubes 21 is a plate having opposite ends 38 and 39 angularly turned to the central portion 40, so as to permit the plate to lie between the reservoirs 1b and 323 and the end layer of tubes 21. This plate serves as a shield to protect the reservoirs from the combustible gases so that proper circulation of the water will not be interfered with.

It will be noted that the structure of the device is one which gives great flexibility to tatl the boiler and provides advantages and l'catures which render the boile a durable one and especially adapted for use on motor vehicles. The arrangement of the tubes is shown in Fig. 4 as being staggered relatively to each other, that is, the positioning of the tubes in one section is staggered in relation to the positioning of the tubes in the other section. This arrangen'ient of the tubes and the relative positioning of the headers, as already described, affords a boiler which may be utilized generally for the purposes of generating steam with a minimum amount of fuel.

lVhile I have illustrated and described the preferred form of structure, 1 do not wish to limit myself to the precise form of st ructure shown, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: 1. A boiler of the class described comprismg an upper and lower set of headers, each set comprising a plurality of parallel extending headers in spaced relation to each other, the headers in the upper set being spaced apart a less distance than the headers in the lower set; a plurality of how shaped tubes connecting the corresponding headers in the upper and lower sets, the tubes connecting adjacent headers being in staggered relation; an L-shaped dome having its base extending transversely of the upper set of said headers adjacent one end thereof; means for connecting said end of said headers in communication with the leg of said dome; a U-shaped dome positioned transversely over the upper set 011": said headers adjacent the opposite end thereof, the leg of said U-shaped dome adjacent said L- shaped dome being angularly turned and extending in parallel relation to the leg of said L-shapcd dome; means for connecting the base of said L-shaped dome with said leg of said U-shaped dome; a reduced portion on the lower end of the leg of said L-shaped dome; a reduced portion on the lower end of said angularly turned leg of said U-shaped dome; a transversely extending pipe in communication with said reduced portions; a pair of parallel extending pipes, each in communication with said transversely extending pipe; and means for connecting said parallel extending pipes in communication with the headers of said lower set. I

2. A boiler of the class described comprising an upper and lower set of headers, each set comprising a plurality of parallel extending headers in spaced relation to each other, the headers in the upper set being spaced apart a less distance than the headers in the lower set; a plurality of bowshaped tubes connecting the corresponding headers in the upper and lower sets, the

tubes connecting adjacent headers being in staggered relation; an L shaped dome having its base extending transversely of the upper set of said headers adjacent one end thereof; means for connecting said end of said headers in communication with the leg of said dome; a U-shaped dome positioned transversely over the upper set of said head ers adjacent the opposite end thereof, the leg of said U-shaped dome adjacent said L- shaped dome being angularly turned and extending in parallel relation to the leg of said L-shaped dome; means for connecting the base of said L-shaped dome with said leg of said U-shaped dome; a reduced portion on the lower end of the leg of said L-shaped dome; a reduced portion on the lower end of said angular-1y turned leg of said U- shaped dome; a transversely extending pipe in communication with said reduced portions; a pair of parallel extending pipes, each in communication with said transversely extending pipe; means for connecting said parallel extending pipes in communication with the headers of said lower set; and a steam outlet pipe communicating witlrthe other leg of said U-shaped dome ,7

adjacent its end.

In testimony whereof I have signed the foregoing.

JOHN H. BAKER. 

